Improvement in blades for



NrTED STATES PATENT OFFICE.

LUKE KAVANAUGH, 0E wA'rEEEoED, NEw YORK.

Specication forming part of Letters Patent No. 37,347, dated January 6, 1863.

.To @ZZ whom it may concern.-

Be it known that I, LUKE KAVANAUGH, of the village of Waterford, in the county of Saratoga and State of New York, have invented a, new and useful Improvement in Blades for Yarn-Sinking Burrs of Knitting- Machines, of which invention the following is a full and exact description, reference being had t0. the annexed drawings, in which- Figure 1 is a side view of one of my improved sinker-burr blades; Fig. 2, a side or end view of a sinker-burr having blades each like the one shown in Fig. l; Fig. 3, an edge view of the burr shown in Fig. 2, engaged with and feeding yarn into needles of a knitting-machine, and Figa, a section of a portion of the parts shown in Fig. 3, taken at the line z z and viewed in the direction pointed by the arrow y, the saine letters of reference indicating like parts in all the gures, and two varieties ot' my improved sinkerburr blade being shown by Figs. 5 and 6.

My improved bladefor sinker-burrs 0f knittingmachines can be distinguished from'all others by having through the blade A an opening, b, so located in respect to the notch ,or guide c for the yarn that in feeding and sinking the yarn a' into and between the needles w in a knitting-machine by means of a sinkerburr having these improved blades the yarn with its knots and large spots in bending around the needles between the blades can then extend into the openings bin the blades, Fig. 4, so as to thereby leave more room between the blades for the needles, and make the blades have less tendency to bind between or against and bend or break the needles, and

less liable to strain or break the yarn by pinehing or nipping it between the needle and blade than if the blade were of the same outside shape and size but solid throughout, while at the same time the inner end, d, of the blade serves to brace or support the part c where the yarn is drawn over it, and also presents for the needle a continuous bearing beyond or clear of the yarn bending over the blade.

The shank e of rny improved sinker-burr blade may be .of any shape capable of being clamped, soldered, cast, or otherwise suitably fastened with a series of such blades in or to a hub, f, so as to thereby form a sinker-burr for a knitting-machine; and that part oi' the blade which is to project beyond the hub of the burr may be of any suitable outside form, and the opening b through the blade may have any suitable shape and sufficient size, even so that the blade will be a mere skeleton, as indicated in Fig. 6, in which case the blade may l consist of a steel wire bent to the proper shape and hardened, provided that in all cases the opening b, or enough thereof, is so opposite to the yarn-guide o that in using a burr having such blades the yarn can enter or bend into the opening bin extending around a needle, as hereinbefore specified.

What I claim as new and of my invention, and desire to secure by Letters Patent, is-

A wing 0r blade for sinker-burrs of knittingmachines, having through it a hole or opening, b, arranged in respect to a yarn-guide, 0, en the blade, substantially as herein described.

LUKE KAVANAUGH. Witnesses:

G. M. PHELPs, AUSTIN F. PARK. 

